4 cylinder mercruiser for straight inboard

[thomt]

Hi new here. I recently purchased two good 4 cylinder IO's and would like to use one in a displacement hull for a work boat. Straight inboard. What do I look for , Type of bellhousing? coupler? transmission. Do 6cylinder and v8 parts interchange? The engines are the early motors based on the chevy 153 c.i. auto engine. Thanks Thom

 

[Bondo]

Re: 4 cylinder mercruiser for straight inboard

The engines are the early motors based on the chevy 153 c.i. auto engine.

Ayuh,... Welcome Aboard,...

Those motors use the same standard bellhousing/ flywheel cover Chevy bolt pattern as every other Chevy, since the 50s...

I don't mess with straight inboards so much, but I'm sure Gear Ratio still comes into play with the I4, vs. I/V6, vs. V8...

 

[zbnutcase]

Re: 4 cylinder mercruiser for straight inboard

You will need a 14in flywheel, inboard coupler, and bellhousing for Velvet Drive trans, as well as a high mount starter. All of this interchanges with Chev V8s, but you will need a pre 86' (2 piece main seal) flywheel. 'nutcase